San Jiao is a term found in traditional Chinese medicine (TCM), as part of modelling the workings of the human body attempted by early Chinese medical writers. References to it can be found in the oldest Chinese medical texts available, including the Yellow Emperor's Huang Di Nei Jing.

San Jiao has been translated as "triple heater," triple warmer (or three warmers)," and "triple burner," the latter of which is probably favored because of the involvement of the San Jiao in metabolism. The current WHO standard term is "Triple Energizer" (TE), but many authors still prefer to use San Jiao.

There are three "burning spaces":

Other Zang Fu organs were not included in the San Jiao model.

The Hand Channel of San Jiao Shao Yang is so called because of its generalized effects across the San Jiao. San Jiao is not an organ. In fact, many Zang Fu organ translations do not directly correspond with their defined western organ.

The Shao Yang channel is the second shallowest channel in the six divisions of channel theory, and its hand division - San Jiao - starts at the fingernail of the ring finger, travels up the outside center of the hand and arm, encompasses the elbow, continues to the back of the Acromio-clavicular joint (part of the shoulder), meeting with the other Yang channels at the junction of the seventh cervical and first thoracic vertebrae (GV-14 "da zhui"), before travelling up the neck to behind the ear, encompassing the external ear and terminating at outer tip of the eyebrow. Aside from Wai Guan (TE-5), its points' most common clinical uses are for local problems.

San or SAN may refer to: